Jaw crusher die mounting

ABSTRACT

In a large size jaw crusher for stones and the like a stationary housing wall and a pitman are each provided with a pair of endwise aligned die plates. Sets of mounting bolts secure the die plates, respectively, to the housing wall and pitman, and each pair of die plates is provided with an interlocking finger joint across its width. The interlocking finger joint couples the endwise aligned die plates together so that lateral thrust components of the crushing force will be transmitted from either die plate to its companion die plate, and the mounting bolts for both die plates will complement each other in taking up such lateral thrust components.

United States Patent. 11 1 DeDiemar JAW CRUSHER DIE MOUNTING [75] Inventor: Ronald B. DeDiemar, Brown Deer,

- Wis.

[73] Assigneez Barber-Greene Company, Aurora,

, Ill.

22 Filed: Sept.l5, 1972 21 Appl. No.2 289,673

[52] us. Cl 241/264, 241/291, 241/300 [51] 1111. C1. B026 1/04, B020 1/10 [58] Field of Search 241/198 R, 198 A, 264, 241/262, 291, 298, 300

1 [$6] I References Cited i 1 UNITED STATES PATENTS 3,140,057 7/1964 P611112 241/291 1125,799 6/1965 Perdue 241/198 R'x 3,582,008 6/1971 MOIZ "241/294 FOREIGN PATENTS 0R APPLICATIONS 863,187 6/1941 France 241/291 816,549 7/1959 Great Britain 1. 241/264 1111 1 3,804,345 1451 Apr. 16, 1974 8/1934 Germany .1 24l/29l 6/1965 Norway 241/264 Primary Examiner-Granville Y. Custer, Jr. Assistant Examiner-Howard N. Goldberg Attorney, Agent, or Firm James 1E. Nilles s7 ABSTRACT I In a large size jaw crusher for stones and the like a stationary housing wall and a pitman are each provided with a pair of endwise aligned die plates. Sets of mounting bolts secure the die plates, respectively, to the housing wall and pitman, and each pair of die plates is provided with an interlocking finger joint across its width. The interlocking finger joint couples the endwise aligned die plates together so that lateral thrust components of the crushing; force will'be trans mitted from either die plate to its companion die plate, and the mounting bolts for both die plateswill complement each other in taking up such lateral thrust components.

2 Claims, 7 Drawing Figures PAIENIEBAPRIB M Y 5804 345 SHEET 1 0F 6 PATENTED I 51974 3 ,8 04, 345

SHEET 3 BF 6 FIG. 3

E 11111 r J M Ii J W 7R 4 ,l w T U191, i v

v 1 QT K I 4 m w J J i w L i a @E crusher.

.IAW CRUSHER DIE MOUNTING BACKGROUND OF THE INVENTION Jaw crushers for stones and the like are conventionally equipped with stationary and swingable replaceable die plates, and retaining wedges are usually employed to secure the stationary die plates to a wall of thecrusherhousing and the swingable die plates to a pitman or like swingable backing structure. Such conventional die mounting, however, is not well suited for large size crushers wherein the stationary and movable jaws are of'considerable length such as9 or 10 feet, and of considerable width such as 4 or feet. The preferred material for the die plates is manganese steel, and constructing the die plates in the form of large single piece manganese steel castings would have several disadvantages. For example, such castings due to their great weight, would be difficult to handle for installation and replacement. Further, a good deal of material would be longitudinal expansion'would cause it to buckle and proper contact with the backing structure would be lost. j v

Subdividing the casting into two or more sections and bolting the sections individually to the backing structures would overcome some of the mentioned difficulties, but that expedient would still leave a serious problem of keeping the individual die sections properly aligned in operation.

A well known characteristic of manganese steel is that it is practically unmachineable with ordinary cutting tools.Accordingly, the die sections would have to be cast with cored out holes for the mounting bolts, and in order to accommodate unavoidable variations of the castings ample lateral clearance would have to be provided for the mounting bolts within the cored out holes. In operation of the crusher, lateral thrust components ofthe crushing force normally arise and act upon the die sections so that the latter tend to shift sidewise rela- .tive to the backing structure. Due to therelatively large lateral clearance of the mounting bolts in the die openings shifting of the die. sections under lateral thrust componentsof the crushing force could become excessive, and at any rate, the sections of the subdivided die would be unable to stay in proper longitudinal alignment with each other during normal operation of the SUMMARY OF THE PRESENT INVENTION A further object of the invention is to provide an improved jaw crusher die which lends itself to lateral in- 2 terlocking engagement with an adjacent companion die.

A still further object of the invention is to provide an improved jaw crusher die of the above mentioned character which not only lends itself to lateral interlocking engagement with an adjacent companion die but which is also endwise interlockable with a common backing structure for both dies.

These and other objects and advantages of the present invention will appear hereinafter as this disclosure progresses, reference being made to the accompanying drawings.

DRAWINGS FIG. 1 is a perspective view of a rock crusher with parts broken away to show die plate mountings embodying the invention;

FIG. 2 is an elevational view of the crusher shown in FIG. 1 with parts broken away and shown in section;

FIG. 3 is a view in the direction of arrows 3-3 in FIG. 2 showing upper and lower swinging die plates and an interlocking finger joint therebetween;

FIG. 4 is a view in the direction of arrows 4-4 in FIG.

2 showing upper and lower stationary die plates and an interlocking finger joint therebetween;

FIG. 5 is an exploded perspective view of the swinging jaw in the crusher shown in FIG. 1;

t FIG. 6 is an exploded perspective view of the stationary jaw in the crusher shown in FIG. 1; and

FIG. 7'is an explanatory sketch of load conditions arising in operationof the crusher shown in FIG. 1.

DESCRIPTION OF A PREFERRED EMBODIMENT bolts-3 separably connecting the housing sections to gether, a swingable jaw assembly 4, and a stationary jaw assembly 6.

The swinging jaw assembly incorporates a cast steel pitman 7 which is conventionally mounted on the upper housing section by means of an eccentric shaft 5. A driving sheave 8 and a flywheel 9 are mounted on opposite ends of the shaft 5, and a. toggle plate 11 and a spring loaded retainer rod 12 are operatively interposed between the free end of the pitman and the lower housing section in conventional manner. 1

The pitman 7 is provided with an upper cast manganese steel die plate 13 and with a lower east manganese steel die plate '14. Referring to FIGS. 3 and 5, theupper die plate 13 is provided with a plurality of cored mounting holes 16, and the lower die plate 14 is similarly pro vided with a plurality of cored mounting holes 17. The pitman 7 has cored bolt holes 18 at substantially the same center spacings as the mounting holes 16 of the upper die plate 13, and the pitman further has cored bolt holes 19 at substantially the same center spacings as the mounting holes 17 of the lower die plate 14.

In the assembled condition of theswinging jaw the upper die plate 13 is drawn up against machined seating strips 21 of the pitman 7 bya set of bolts 22 which extend through registering pairs of holes 16 and 18, and carry nuts and jam nuts 24 on their threaded ends. The lower die plate 14 is similarly drawn up against the seating strips 21 of the pitman 7 by another set of bolts 23 which extend through registering pairs of holes 17 and 19 and have nuts and jaminuts 26 on their threaded ends. The shanks of the bolts 22, 23 have relatively ample lateral clearance in the holes 18 and 19, respectively, of the cast pitman, and in the holes 16 and 17, respectively, of the cast die plates 13 and 14. Ample lateral clearance of the bolts 22, 23 in the die plate holes and in the pitman holes is necessitated by the fact that'all of these holes are cored and therefore cannot be held closely to exactly the same center distances.

In order to produce the required crushing action of the swinging jaw assembly 4, the upper and lower die plates 13 and 14 are corrugated in conventional manner, transversely spaced ribs 27 extending lengthwise between the opposite ends of the die plate 13, and transversely spaced ribs 28 extending lengthwise. between the opposite ends of the die plate 14. Further, the upper die plate 13 is provided with a row of alternating projections 29 and recesses 31 along its lower edge, these projections and recesses extending lengthwise of the plate 13 and transversely of the holes 16 as viewed in FIG. 3. A corresponding row of alternating recesses 32 and projections 33 is provided along the upper edge of the lower die plate 14, and in the assembled condition of the swinging jaw assembly as best shown in FIG. 1, the projections 29 of the upper die plate interlock with the recesses 32 of the lower die plate; and the projections 33 of the lower die plate interlock with the recesses 31 of the upper die plate. The confronting projections and recesses of the upper and lower die plates provide an interlocking finger joint across their width, and such joint serves two principal purposes. First, it keeps the ribs 27 and 28 of the upper and lower die plates in longitudinal alignment with each other; and in the second place, the interlocking finger joint enables the mounting bolts 22, 23 to complement each other in taking up lateral thrust components of the crushing force as will be explained hereinbelow with reference to FIG. 7.

The stationary jaw assembly, like the swinging jaw assembly, is provided with an upper cast manganese steel die plate 34 and with a lower east manganese steel die plate 36. The upper die plate 34 faces an upright wall portion 38 of the upper housing section 2 and is drawn up against machined seating strips 37 by means of a set of bolts 39 which extend through cored holes 41 of the upper die plate 34 and registering bored holes 42 of the upper housing wall, the bolts 39 having nuts and jam nuts 43 on their threaded ends. The stationary lower die plate 36 faces an upright wall portion 46 which is coplanar with the upper wall portion 38, and the lower die plate 36 is drawn up against machined seating strips 44 on the wall portion 46 of the lower housing section -2, by means of aset of bolts 47 which extend through cored holes 48 of the lower die plate 36 and registering bored holes 49 of the lower housing wall, the bolts 47carrying nuts and jam nuts 51 on their threaded ends.

Like the upper and lower die plates of the swinging jaw assembly, the upper and lower die plates of the stationary jaw assembly have corrugated crushing faces and are coupled together by an interlocking finger joint, the upperv die plate 34 having a row of alternating, lengthwise extending projections 52 and recesses 53 along its lower edge, and the lower die plate 36 having a row of alternating, lengthwise extending recesses 54 and projections 56. In the assembled condition of the stationary jaw assembly, as illustrated by FIG. 4, the

projections 52 of the upper die plate interlock with the recesses 54 of the lower die plate, and the projections 56 of the lower die plate interlock with the recesses 53 of the upper die plate.

The upper and lower die plates of the stationary jaw assembly are further keyed to the upper and lower housing sections at their relatively adjacent ends. As shown in FIG. 6, the wall sections 38 and 46 of the upper and lower housing sections are recessed along their relatively adjacent ends so as to provide a reentrant groove 57 which extends across the width of the crusher housing between the upper and lower section thereof. The projections 52 of the upper die plate are extended rearwardly to form lugs 58 which in the assembled condition of the stationary jaw assembly are seated in the groove 57, between the upper and lower side walls thereof which extend at right angles to the faces of the coplanar wall portions 38 and 46. Engagement of the lugs 58 with the upper and lower side walls of the grooves 57 keys the upper die plate 34 vertically on the crusher housing. The projections 56 of the lower die plate 36 are extended rearwardly to form lugs 59 which in the assembled condition of the stationary jaw assembly alternate with the lugs 58 in the groove 57, the lugs 59 like the lugs 58 being fitted between the upper and lower side walls of the groove 57 so as to key the lower die plate vertically on the crusher housing.

Referring to FIG. 7, a rock 61 is shown between the stationary die assembly 6 and the swinging die assembly 4 in a position which causes oppositely directed side loads to become effective upon the stationary and swingable jaw assemblies when the swinging jaw assembly is forced toward the stationary jaw assembly by rotation of the eccentric shaft 5 and conjoint action of the toggle plate 11. Under the load conditions illustrated by FIG. 7 a lateral thrust component T of the crushing force C tends to shift one of the die plates of the swinging jaw assembly 4 to the right on the pitman 7, and a corresponding lateral thrust component T, ofthe crushing force C tends to shift the opposite die plate of the stationary jaw assembly to the left on the stationary housing wall assembly 38, 46. Since the upper and lower die plates of the swinging jaw assembly are coupled together by the interlocking finger joint therebetween, the mounting bolts of both swingable jaw plates will complement each other in taking up the lateral thrust component T. At the same time, the interlocking finger joint between the upper and lower stationary die plates will provide for lateral load transfer therebetween so that the mounting bolts of both stationary die plates will complement each other in taking up the lateral thrust component T Conventional thrust pin assemblies 61 and 62 are provided to transfer sideloads from the swingable jaw assembly to the crusher housing. As shown in FIGS. 1 & 2, a pair of retaining wedges 63 engage a beveled upper edge of the swinging die plate 13, and an adjacent beveled edge of a conventional hub guard 64, the wedges being held in place by bolts 66 and associated nuts 67. The lower edge of the lower die plate 14 is beveled to match a correspondingly beveled retaining ledge 68 at the lower end of the pitman 7.

I claim:

1. In a jaw crusher, the combination of separately interconnected upper and lower housing sections presenting upright coplanar wall portions, respectively, said wall portions being recessed along their relatively adjacent ends to define a re-entrant groove therebetween,

adjacent edge of said other plate in interlocking relation with the projections and recesses, respectively, of said first row; said projections of said die plates having lug portions seated in said groove between said wall portions of said upper and lower housing sections.

2. The combination of elements set forth in claim 1 wherein said groove has upper and lower side walls in right angle relation to the faces of said coplanar wall portions. 

1. In a jaw crusher, the combination of separately interconnected upper and lower housing sections presenting upright coplanar wall portions, respectively, said wall portions being recessed along their relatively adjacent ends to define a re-entrant groove therebetween, a pair of cast manganese steel die plates facing said wall portions, respectively, in endwise adjacent relation to each other, fastening bolts extending through cored holes in said die plates and through registering holes in said wall portions for drawing said die plates into face contact, respectively, with said wall portions; a first row of alternating projections and recesses along the edge of one of said plates confronting the adjacent edge of the other of said plates; and a complementary second row of alternating recesses and projections along said adjacent edge of said other plate in interlocking relation with the projections and recesses, respectively, of said first row; said projections of said die plates having lug portions seated in said groove between said wall portions of said upper and lower housing sections.
 2. The combination of elements set forth in claim 1 wherein said groove has upper and lower side walls in right angle relation to the faces of said coplanar wall portions. 